exam 1 paper

What ligament reinforces the sternoclavicular joint

posterior sternoclavicular joint

part of rotator cufff

SITS- supraspinatus, infraspinatus, teres minor, subscapularis

origin of pectoralis major

• clavicle, sternum, and upper 6 costal cartilages

what part of the ulnohumeral joint prevents medial dislocation

trochlea of the humerus and ulnar collateral ligament prevent medial dislocation

what muscle inserts into the superior angle of the scapula

levator scapulae

what type of joint is an acromioclavicular joint

planar or gliding joint

which muscles insert into the intertubercular sulcus or groove

teres major, latissimus dorsi, pectoralis major

if a lesion accurs in the upper and lower subscapular nerves what muscles should be paralyzed

subscapularis and teres major

if subscapularis and teres major suffer injury how would this affect the stability of the glenohumeral joint and what direction

be less stable, lateral direction

what muscle initiates abduction of the arm

supraspinatus

flexor carpi radialis muscle is innervated by what nerve and inserts into what

median nerve, 2nd metacarpal

what muscle inserts into the medial border of the scapula

rhomboid major and minor

what landmark does the axillary artery’s name change to brachial artery

inferior border of teres major

origin of deltoid muscle

lateral third of clavicle, acromion process, and spine of scapula

what group of muscles attaches into the coracoid process

coracobrachialis, pectoralis minor, short head of biceps brachii

what ligament holds the head and neck of the radius in place in the radial groove of the ulna

anular ligament of the radius

origin of the supinator muscle

lateral epicondyle of the humerus, supinator fossa of ulna, and radial collateral and annular ligaments

origin of the lateral head of triceps brachii

posterior/ superior humerus, superior radial groove

what nerve is affected by ‘hand of benediction”

median nerve

could hand of benediction symptom results from carpal tunnel syndrome

no, lateral part of flexor digitorum profundus is paralyzed which could not happen if lesion occurred in the wrist

which muscle inserts into the distal phalanx of digits 2-5

flexor digitorum profundus

when someone grips something very strongly ( power grip), some extensor muscles of the forearm also contract. which of the following muscles is an extensor muscle that contracts during strong gripping

extensor carpi radialis brevis

the deep transverse metacarpal ligaments limit the amount of motion possible at what joints

metacarpophalangeal joints of digits 2-5

what bones form the wrist joint

radius, scaphoid, lunate

what muscle inserts into the 2nd metacarpal

extensor carpi radialis longus

flexor digitorum superficialis causes flexion ( atleast a little bit) at all the following joints

proximal interphalangeal, metacarpophalangeal joints (digits 2,3,4,5), wrist

what muscle originates from the tendons of another muscle

lumbricals- from tendon of flexor digitorum profundis

origin of abductor pollicis brevis

scaphoid, trapezium, flexor retinaculum

what nerve supplies trapezius muscle

spinal accessory nerve

if a person cannot hold a sheet of paper between 4th and 5th digit what nerve must be injured (struck on posterior/medial part of elbow)

ulnar nerve

specifically where was patient struck

groove for ulnar nerve, medial epicondyle of humerus

innervated by median nerve

pronator teres, flexor pollicis longus, pronator quadratus, flexor digitorim superficialis,

what muscle flexes the elbow and is innervated by the radial nerve

brachioradialis

why does the first carpometacarpal joint have a large range of motion, and why does capometacarpal joints 2-5 joints have a small range of motion

1st carpometacarpal joint has a loose joint capsule, while CMC joints 2-5 have a tight capsule that they share

what muscles are innervated by the radial nerve

extensor carpi radialis brevis, anconeus, long head of triceps brachii, abductor pollicis longus

what muscle is innervated by median nerve

pronator teres

what muscles pass through the carpal tunnel

flexor digitorum superficialis, flexor digitorum profundus, flexor pollicis longus, flexor carpi radialis

which muscle or group of muscles flexes metacarpophalangeal joints, extends the interphalangeal joints, and abducts digits 2-4

lumbrical muscles

which muscles are innervated by the axillary nerve

teres minor and deltoid

what muscle makes the scapula rotate so that the glenoid fossa points more superiorly

serratus anterior

based on the location of the serratus anterior and the removal os axillary tissue what nerve was injured

long thoracic nerve

what muscles attach to the 3rd digit

extensor digitorum, flexor digitorum profundus, lumbricals, dorsal interosseous

what muscle inserts into the first metacarpal

abductor pollicis longus

example of a saddle joints

trapezium to 1st metacarpal

what hand muscle is innervated by the median nerve

flexor pollicis brevis

what structure reduces friction between the acromion process and the tendon of the supraspinatus muscle

subacromial bursa